CA2045963A1 - Method and apparatus for detecting recorded signals on a magnetic recording medium - Google Patents

Method and apparatus for detecting recorded signals on a magnetic recording medium

Info

Publication number
CA2045963A1
CA2045963A1 CA2045963A CA2045963A CA2045963A1 CA 2045963 A1 CA2045963 A1 CA 2045963A1 CA 2045963 A CA2045963 A CA 2045963A CA 2045963 A CA2045963 A CA 2045963A CA 2045963 A1 CA2045963 A1 CA 2045963A1
Authority
CA
Canada
Prior art keywords
read
signals
recording medium
read signal
magnetic recording
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2045963A
Other languages
French (fr)
Other versions
CA2045963C (en
Inventor
Siegbert Sadowski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Quantum Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2045963A1 publication Critical patent/CA2045963A1/en
Application granted granted Critical
Publication of CA2045963C publication Critical patent/CA2045963C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Digital Magnetic Recording (AREA)

Abstract

A process and a circuit arrangement are provided for recovering digital signals from a recording of the digital signals. The recorded signals are read by a read head of a storage device on sensing a storage medium. The signals read by the read head are converted into processed read signals by amplification and filtering compensation for linear distortion, amplitude control, etc. Thereafter the profile of the processed read signal is sensed and compared with a stored read signal comparison pattern which corresponds to a normal read signal. In the case of agreement, which is given on the presence of a certain correlation, this part of the read signal is evaluated as a read pulse and on non-agreement as a non-pulse.
CA002045963A 1990-06-29 1991-06-28 Method and apparatus for detecting recorded signals on a magnetic recording medium Expired - Fee Related CA2045963C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4020875.3 1990-06-29
DE4020875A DE4020875A1 (en) 1990-06-29 1990-06-29 METHOD AND CIRCUIT ARRANGEMENT FOR CONVERTING ANALOG READ SIGNALS TO DIGITAL SIGNALS

Publications (2)

Publication Number Publication Date
CA2045963A1 true CA2045963A1 (en) 1991-12-30
CA2045963C CA2045963C (en) 1997-12-23

Family

ID=6409421

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002045963A Expired - Fee Related CA2045963C (en) 1990-06-29 1991-06-28 Method and apparatus for detecting recorded signals on a magnetic recording medium

Country Status (5)

Country Link
US (1) US5239423A (en)
EP (1) EP0464477B1 (en)
JP (1) JPH081736B2 (en)
CA (1) CA2045963C (en)
DE (2) DE4020875A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4006426C2 (en) * 1990-03-01 1993-11-18 Siemens Nixdorf Inf Syst Method for evaluating binary information from a magnetic memory card
US5802505A (en) * 1993-04-13 1998-09-01 Matsushita Electric Industrial Co., Ltd. Waveform signal equalizing method and apparatus and signal recording and reproducing apparatus
US5408366A (en) * 1993-06-14 1995-04-18 International Business Machines Corporation Apparatus and method for detecting and validating formatted blocks on magnetic tape
DE4415811A1 (en) * 1994-05-05 1995-11-09 Thomson Brandt Gmbh Method for equalizing distorted data signals
JP3841683B2 (en) * 2000-02-17 2006-11-01 株式会社ルネサステクノロジ Information playback device
US6711558B1 (en) 2000-04-07 2004-03-23 Washington University Associative database scanning and information retrieval
JP3813079B2 (en) * 2001-10-11 2006-08-23 沖電気工業株式会社 Chip size package
EP2528000B1 (en) 2003-05-23 2017-07-26 IP Reservoir, LLC Intelligent data storage and processing using FPGA devices
US10572824B2 (en) 2003-05-23 2020-02-25 Ip Reservoir, Llc System and method for low latency multi-functional pipeline with correlation logic and selectively activated/deactivated pipelined data processing engines
WO2006096324A2 (en) 2005-03-03 2006-09-14 Washington University Method and apparatus for performing biosequence similarity searching
US8326819B2 (en) 2006-11-13 2012-12-04 Exegy Incorporated Method and system for high performance data metatagging and data indexing using coprocessors
US7660793B2 (en) 2006-11-13 2010-02-09 Exegy Incorporated Method and system for high performance integration, processing and searching of structured and unstructured data using coprocessors
EP3560135A4 (en) 2016-12-22 2020-08-05 IP Reservoir, LLC Pipelines for hardware-accelerated machine learning

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3518650A (en) * 1968-03-22 1970-06-30 Sperry Rand Corp Signal comparator having distributed playback heads
GB1577916A (en) * 1978-01-18 1980-10-29 Ibm Data recognition apparatus
US4346411A (en) * 1981-02-17 1982-08-24 International Business Machines Corporation Amplitude sensitive three-level detector for derivative read back channel of magnetic storage device
JPS5996513A (en) * 1982-11-24 1984-06-04 Nippon Gakki Seizo Kk Method for recording and reproducing waveform
JPS59203209A (en) * 1983-04-30 1984-11-17 Matsushita Electric Ind Co Ltd Digital signal detector
DE3532912C1 (en) * 1985-09-14 1986-11-13 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Method of bit determination in a signal characteristic which is recorded in Harvard biphase code
US4837642A (en) * 1988-01-12 1989-06-06 Ampex Corporation Threshold tracking system
DE3813857A1 (en) * 1988-04-23 1989-11-02 Licentia Gmbh METHOD FOR REDUCING THE INTERFERENCE OF A PERIODIC SIGNAL AND DEVICE FOR CARRYING OUT THE METHOD
US5120985A (en) * 1989-01-31 1992-06-09 Fujitsu Limited Data reproducing circuit for correcting amplitude variation and peak shift

Also Published As

Publication number Publication date
DE4020875A1 (en) 1992-01-02
DE69131675D1 (en) 1999-11-11
JPH05217289A (en) 1993-08-27
EP0464477B1 (en) 1999-10-06
CA2045963C (en) 1997-12-23
EP0464477A3 (en) 1993-03-17
JPH081736B2 (en) 1996-01-10
US5239423A (en) 1993-08-24
DE69131675T2 (en) 2000-04-06
EP0464477A2 (en) 1992-01-08

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed